Baffle muffler silencer



Jan. 10, 1956 J. H. BAILEY BAFFLE MUFFLER SILENCER Filed May 21, 1951 m5m Y V A :N. P 9 m8 R m h N l H. m T N A Y B N Pm QW vw Q %N TN vw QN QN/w v% w \w w w w \Jn \T m n m w ll L w h M m &

United States Patent RAFFLE MUFFLER SILENCER John H. Bailey, Sacramento,Calif.

Application May 21, 1951, Serial Ne. 227,391

1 Claim. (Cl. 181-47) My invention relates to improvements in a bafilemufiler silencer for diesel engines in trucks.

This invention relates to new and useful improvements in mufllers fordiesel engines and consists in the provision of a silencer of thisnature whereby the possibility of back pressure and after firing areeliminated and by which an economy in fuel is afforded.

My invention consists essentially in the provision of a mufller having aseries of conical shaped members, the open ends of which extendcentrally through the cylindrical muffler body.

The invention finally consists in the combination and arrangements ofconical bathe plates set forth in the following specification, andparticularly pointed out in the claim thereof, and a series of conicalbathe plates located within said cylindrical muffler body, the smallerends of said conical baffle plates pointed toward the inlet end of themuflier.

Other objects and advantages of the invention will be apparent duringthe course of the following description:

Figure 1 is a longitudinal section through the center of mufiler.

Figure 2 is a sectional view along line 2-2 of Figure 1, and

Figure 3 is a sectional view of construction of outlet end of mufller.

In the drawings, wherein for the purpose illustration is shown apreferred embodiment of my invention the numeral 1 designates an outercylindrical casing, or mufiler body. This cylindrical mufiler bodyincludes a front portion, or conical shaped baflle plate 4, which issimilar to conical shaped baffle plates 2, used throughout the mufiler,3 is a round opening in bathe plate, within which is inserted acylindrical shaped sleeve 5 inside diameter of which is the same as theoutside diameter of an exhaust pipe on an automobile, truck oraeroplane, 8 shows the direction of the exhaust from the vehicle towhich the muffler is attached, within the outer cylindrical casing isplaced a series of conical shaped baflle plates 2 which are electricallybutt welded at 2A to the cylindrical casing 1. The back portion of themufiler also has a conical shaped baflle plate 4A attached theretosimilar to the front portion into which is inserted a cylindrical shapedsleeve to permit the exhaust of the gases from an automobile or truckmotor. In Figure 3 the numeral 7 designates and shows in detail theflange for spot welding, or electrically butt welding, of the conicalshaped bafile plates 2 to the outer cylindrical casing 1 while 6 showsthe last bafile plate within the mufiler and the baffle plate 4A onoutside of mufiler.

By the provision of a silencing muflier made in accordance with myinvention on the principle of a series of conical shaped bafile plates,I have found that after firing is avoided, a great saving of fueleffected and dispensing with the noise usually accompanying the openingof the cut out in climbing hills and, owing to the direct passage of thegas, its course is prevented from spreading and which tends to decreasethe velocity of the gas, whereas, in the operation of mufflers in whichreverse arrangement of a conical shaped bafile plates are employed, thegases are allowed to spread and necessarily retard their exit.

What I claim is new:

A silencing mufiler having a front inlet and a back outlet andcomprising a casing having imperforate cylindrical walls and providedwith a front upstream bafile plate having a central opening therein anda back downstream plate with a central opening therein, a series ofadditional bafile plates mounted within said casing and located betweensaid front baffle plate and said back plate, each of said bafile plateshaving imperforate sloping conical sides extending continuously fromsaid imperforate casing walls to a single central opening and convergingin a direction toward said front bafiie plate to terminate up stream insaid central opening, the height of said conical plates forming but asmall fraction of the base diameter thereof, and cylindrical stiffeningsleeves on said baffle plates projecting in an upstream direction fromthe perimeter of said openings whereby portions of the exhaust gasesentering through the opening in said front bafile plate are deflectedtoward said imperforate sides of said baflle plates and toward saidimperforate casing walls.

References Cited in the file of this patent UNITED STATES PATENTS1,061,272 De Witt May 13, 1913 1,874,326 Mason Aug. 30, 1932 1,990,837Morgenstern Feb. 12, 1935 2,353,914 McLeod July 18, 1944 2,502,709Dorman Apr. 4, 1950 2,514,996 Faust July 11, 1950 2,562,101 Hoyle July24, 1951 FOREIGN PATENTS 275,364 Germany June 16, 1914 141,254 GreatBritain Apr. 15, 1920

